Many thanks for all your answers. Converting to a matrix didn't help, I tried with Hmisc but didn't get anywhere (different summary functions, multiple levels).
2005/10/14, jim holtman <[EMAIL PROTECTED]>: > Here is the way that I would do it. Using 'lapply' to process the list and > create a matrix [snip] Wow! That's a wonderful suggestion, Your code works just fine with my data (takes 11 seconds). Thanks a lot, I couldn't have written such code (reading some help entries now...). Hans-Peter ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
